Answer:
b. Public Goods
Step-by-step explanation:
Public Goods -
It is the type of goods and services , which each and every person can use , without any kind of restriction , is known as public goods .
These type of goods are considered to be non - rivalrous , i.e. , these goods do not reduce , irrespective of their usage .
And ,
are non - excludable , i.e. , these goods are open for all and some individual or group van not hold on to it .
The example of public goods are - public parks , sewer system , law enforcement etc .